| // RUN: %clang_cc1 -emit-llvm -O1 -o - -fexceptions -triple=i386-pc-win32 %s | FileCheck %s |
| |
| struct S { char a; }; |
| struct V { virtual void f(); }; |
| struct A : virtual V {}; |
| struct B : S, virtual V {}; |
| struct T {}; |
| |
| T* test0() { return dynamic_cast<T*>((B*)0); } |
| // CHECK-LABEL: define dso_local noalias noundef ptr @"?test0@@YAPAUT@@XZ"() |
| // CHECK: ret ptr null |
| |
| T* test1(V* x) { return &dynamic_cast<T&>(*x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test1@@YAPAUT@@PAUV@@@Z"(ptr noundef %x) |
| // CHECK: [[CALL:%.*]] = tail call ptr @__RTDynamicCast(ptr %x, i32 0, ptr nonnull @"??_R0?AUV@@@8", ptr nonnull @"??_R0?AUT@@@8", i32 1) |
| // CHECK-NEXT: ret ptr [[CALL]] |
| |
| T* test2(A* x) { return &dynamic_cast<T&>(*x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test2@@YAPAUT@@PAUA@@@Z"(ptr noundef %x) |
| // CHECK: [[VBTBL:%.*]] = load ptr, ptr %x, align 4 |
| // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, ptr [[VBTBL]], i32 1 |
| // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, ptr [[VBOFFP]], align 4 |
| // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, ptr %x, i32 [[VBOFFS]] |
| // CHECK-NEXT: [[CALL:%.*]] = tail call ptr @__RTDynamicCast(ptr nonnull [[ADJ]], i32 [[VBOFFS]], ptr nonnull @"??_R0?AUA@@@8", ptr nonnull @"??_R0?AUT@@@8", i32 1) |
| // CHECK-NEXT: ret ptr [[CALL]] |
| |
| T* test3(B* x) { return &dynamic_cast<T&>(*x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test3@@YAPAUT@@PAUB@@@Z"(ptr noundef %x) |
| // CHECK: [[VBPTR:%.*]] = getelementptr inbounds i8, ptr %x, i32 4 |
| // CHECK-NEXT: [[VBTBL:%.*]] = load ptr, ptr [[VBPTR:%.*]], align 4 |
| // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, ptr [[VBTBL]], i32 1 |
| // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, ptr [[VBOFFP]], align 4 |
| // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 |
| // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, ptr %x, i32 [[DELTA]] |
| // CHECK-NEXT: [[CALL:%.*]] = tail call ptr @__RTDynamicCast(ptr [[ADJ]], i32 [[DELTA]], ptr nonnull @"??_R0?AUB@@@8", ptr nonnull @"??_R0?AUT@@@8", i32 1) |
| // CHECK-NEXT: ret ptr [[CALL]] |
| |
| T* test4(V* x) { return dynamic_cast<T*>(x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test4@@YAPAUT@@PAUV@@@Z"(ptr noundef %x) |
| // CHECK: [[CALL:%.*]] = tail call ptr @__RTDynamicCast(ptr %x, i32 0, ptr nonnull @"??_R0?AUV@@@8", ptr nonnull @"??_R0?AUT@@@8", i32 0) |
| // CHECK-NEXT: ret ptr [[CALL]] |
| |
| T* test5(A* x) { return dynamic_cast<T*>(x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test5@@YAPAUT@@PAUA@@@Z"(ptr noundef %x) |
| // CHECK: [[CHECK:%.*]] = icmp eq ptr %x, null |
| // CHECK-NEXT: br i1 [[CHECK]] |
| // CHECK: [[VBTBL:%.*]] = load ptr, ptr %x, align 4 |
| // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, ptr [[VBTBL]], i32 1 |
| // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, ptr [[VBOFFP]], align 4 |
| // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, ptr %x, i32 [[VBOFFS]] |
| // CHECK-NEXT: [[CALL:%.*]] = tail call ptr @__RTDynamicCast(ptr nonnull [[ADJ]], i32 [[VBOFFS]], ptr {{.*}}@"??_R0?AUA@@@8", ptr {{.*}}@"??_R0?AUT@@@8", i32 0) |
| // CHECK-NEXT: br label |
| // CHECK: [[RET:%.*]] = phi ptr |
| // CHECK-NEXT: ret ptr [[RET]] |
| |
| T* test6(B* x) { return dynamic_cast<T*>(x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test6@@YAPAUT@@PAUB@@@Z"(ptr noundef %x) |
| // CHECK: [[CHECK:%.*]] = icmp eq ptr %x, null |
| // CHECK-NEXT: br i1 [[CHECK]] |
| // CHECK: [[VBPTR:%.*]] = getelementptr inbounds i8, ptr %x, i32 4 |
| // CHECK-NEXT: [[VBTBL:%.*]] = load ptr, ptr [[VBPTR]], align 4 |
| // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, ptr [[VBTBL]], i32 1 |
| // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, ptr [[VBOFFP]], align 4 |
| // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 |
| // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, ptr %x, i32 [[DELTA]] |
| // CHECK-NEXT: [[CALL:%.*]] = tail call ptr @__RTDynamicCast(ptr nonnull [[ADJ]], i32 [[DELTA]], ptr {{.*}}@"??_R0?AUB@@@8", ptr {{.*}}@"??_R0?AUT@@@8", i32 0) |
| // CHECK-NEXT: br label |
| // CHECK: [[RET:%.*]] = phi ptr |
| // CHECK-NEXT: ret ptr [[RET]] |
| |
| void* test7(V* x) { return dynamic_cast<void*>(x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test7@@YAPAXPAUV@@@Z"(ptr noundef %x) |
| // CHECK: [[RET:%.*]] = tail call ptr @__RTCastToVoid(ptr %x) |
| // CHECK-NEXT: ret ptr [[RET]] |
| |
| void* test8(A* x) { return dynamic_cast<void*>(x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test8@@YAPAXPAUA@@@Z"(ptr noundef %x) |
| // CHECK: [[CHECK:%.*]] = icmp eq ptr %x, null |
| // CHECK-NEXT: br i1 [[CHECK]] |
| // CHECK: [[VBTBL:%.*]] = load ptr, ptr %x, align 4 |
| // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, ptr [[VBTBL]], i32 1 |
| // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, ptr [[VBOFFP]], align 4 |
| // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, ptr %x, i32 [[VBOFFS]] |
| // CHECK-NEXT: [[RES:%.*]] = tail call ptr @__RTCastToVoid(ptr nonnull [[ADJ]]) |
| // CHECK-NEXT: br label |
| // CHECK: [[RET:%.*]] = phi ptr |
| // CHECK-NEXT: ret ptr [[RET]] |
| |
| void* test9(B* x) { return dynamic_cast<void*>(x); } |
| // CHECK-LABEL: define dso_local noundef ptr @"?test9@@YAPAXPAUB@@@Z"(ptr noundef %x) |
| // CHECK: [[CHECK:%.*]] = icmp eq ptr %x, null |
| // CHECK-NEXT: br i1 [[CHECK]] |
| // CHECK: [[VBPTR:%.*]] = getelementptr inbounds i8, ptr %x, i32 4 |
| // CHECK-NEXT: [[VBTBL:%.*]] = load ptr, ptr [[VBPTR]], align 4 |
| // CHECK-NEXT: [[VBOFFP:%.*]] = getelementptr inbounds i32, ptr [[VBTBL]], i32 1 |
| // CHECK-NEXT: [[VBOFFS:%.*]] = load i32, ptr [[VBOFFP]], align 4 |
| // CHECK-NEXT: [[DELTA:%.*]] = add nsw i32 [[VBOFFS]], 4 |
| // CHECK-NEXT: [[ADJ:%.*]] = getelementptr inbounds i8, ptr %x, i32 [[DELTA]] |
| // CHECK-NEXT: [[CALL:%.*]] = tail call ptr @__RTCastToVoid(ptr nonnull [[ADJ]]) |
| // CHECK-NEXT: br label |
| // CHECK: [[RET:%.*]] = phi ptr |
| // CHECK-NEXT: ret ptr [[RET]] |
| |
| namespace PR25606 { |
| struct Cleanup { |
| ~Cleanup(); |
| }; |
| struct S1 { virtual ~S1(); }; |
| struct S2 : virtual S1 {}; |
| struct S3 : S2 {}; |
| |
| S3 *f(S2 &s) { |
| Cleanup c; |
| return dynamic_cast<S3 *>(&s); |
| } |
| // CHECK-LABEL: define dso_local noundef ptr @"?f@PR25606@@YAPAUS3@1@AAUS2@1@@Z"( |
| // CHECK: [[CALL:%.*]] = invoke ptr @__RTDynamicCast |
| |
| // CHECK: call x86_thiscallcc void @"??1Cleanup@PR25606@@QAE@XZ"( |
| // CHECK: ret ptr [[CALL]] |
| } |